cupyx.scipy.signal.kaiserord#

cupyx.scipy.signal.kaiserord(ripple, width)[source]#

Determine the filter window parameters for the Kaiser window method.

The parameters returned by this function are generally used to create a finite impulse response filter using the window method, with either firwin or firwin2.

Parameters:

ripple (float) –
Upper bound for the deviation (in dB) of the magnitude of the filter’s frequency response from that of the desired filter (not including frequencies in any transition intervals). That is, if w is the frequency expressed as a fraction of the Nyquist frequency, A(w) is the actual frequency response of the filter and D(w) is the desired frequency response, the design requirement is that:
```
abs(A(w) - D(w))) < 10**(-ripple/20)
```
for 0 <= w <= 1 and w not in a transition interval.
width (float) – Width of transition region, normalized so that 1 corresponds to pi radians / sample. That is, the frequency is expressed as a fraction of the Nyquist frequency.

Returns:

numtaps (int) – The length of the Kaiser window.
beta (float) – The beta parameter for the Kaiser window.